﻿#region License

// Created by John Batte on 04/22/2012 at 8:00 AM.
// Last code cleanup: 04/22/2012 at 8:31 AM.
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#endregion

using System;
using System.Security.Policy;

namespace BatteCode.Fx.Plugins
{
	/// <summary>
	/// 	Defines an assembly-level plugin hash. Used for security checks during plugin loading.
	/// </summary>
	[AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true)]
	public class PluginAttribute : Attribute
	{
		/// <summary>
		/// 	Initializes a new instance of the <see cref="PluginAttribute" /> class.
		/// </summary>
		/// <param name="pluginContract"> The plugin contract. </param>
		public PluginAttribute(Type pluginContract)
		{
			var hashEvidence = new Hash(pluginContract.Assembly);
			Hash = Convert.ToBase64String(hashEvidence.MD5);
			Contract = pluginContract.AssemblyQualifiedName;
		}

		/// <summary>
		/// 	Gets the hash.
		/// </summary>
		public string Hash{ get; private set; }

		/// <summary>
		/// Gets the contract.
		/// </summary>
		public string Contract { get; private set; }
	}
}